Signs and symptoms of injury to the lobes of the brain.

Signs and symptoms of injury to the
lobes of the brain

Frontal lobe
Function---- Signs of impairment

Precentral gyrus (motor cortex)---- Contralateral
hemiparesis/hemiplegia

Broca’s area---- Broca’s dysphasia
Supplementary motor area --Paralysis of contralateral head and eye
movement
Prefrontal areas ---Disinhibition, poor judgement, akinesia, indifference,
emotional lability, gait disturbance, incontinence, primitive reflexes
Paracentral lobule ---Incontinence of urine and faeces



Parietal lobe

Postcentral gyrus ----Hemisensory loss/disturbance:
postural, passive movement, localization of light touch,
two-point discrimination, astereognosis, sensory inattention
Supramarginal and angular gyri ---Wernicke’s dysphasia
Dominant parietal lobe---- Finger agnosia, acalculia, agraphia,
confusion between right and left
Optic radiation---- Homonymous quadrantanopia